Home / 20,774.77-31,115.67-9,664.81

Finding the Fourth Proportional to 20,774.77, 31,115.67 and 9,664.81

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Solution

The fourth proportional to 20,774.77, 31,115.67 and 9,664.81 is: 14,475.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.77 : 31,115.67 = 9,664.81 : x
  2. Step 2: Convert to fraction form
    20,774.77/31,115.67 = 9,664.81/x
  3. Step 3: Cross multiply
    20,774.77x = 31,115.67 × 9,664.81
  4. Step 4: Simplify right side
    20,774.77x = 300,726,882.99
  5. Step 5: Solve for x
    x = 300,726,882.99/20,774.77
  6. Step 6: Final answer
    x = 14,475.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.